2666738 has 8 divisors (see below), whose sum is σ = 4108332. Its totient is φ = 1297296.

The previous prime is 2666717. The next prime is 2666743. The reversal of 2666738 is 8376662.

It can be written as a sum of positive squares in 2 ways, for example, as 2666689 + 49 = 1633^2 + 7^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2666738² = 14222983121288, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17945 + ... + 18092.

2^2666738 is an apocalyptic number.

2666738 is a deficient number, since it is larger than the sum of its proper divisors (1441594).

2666738 is a wasteful number, since it uses less digits than its factorization.

2666738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36076.

The product of its digits is 72576, while the sum is 38.

The square root of 2666738 is about 1633.0150029929. The cubic root of 2666738 is about 138.6734913534.

The spelling of 2666738 in words is "two million, six hundred sixty-six thousand, seven hundred thirty-eight".